Hello,

Same issue.
Have installed last NVidia Drivers 390.77 (release 29/01/2018)
Have deactivated everything in "startup"
FFXIV is not blocked by my firewall nor antivirus

Whatever directx i choose (9 or 11), after a short time playing, i have colored spot like confettis everywhere on the screen, getting bigger quickly and then game crash with this directx error. I need each time to reboot computer completely.
I'm back to the game since yesterday after almost 6 month away, i had no issue in the past. I'm a bit bored that i paid 60 days + servant service if i cannot play